Stick with me here...
We're getting to know all about the Polar Vortex - - Milwaukee was stuck at -13 degrees this morning, with a chill factor of -41 - - but a similar phenomenon happened last year and a leading scientist says it's appearing more often.
The event began exactly one year ago:
This phenomenon, known as a “sudden stratospheric warming event
Sudden stratospheric warming events take place in about half of all Northern Hemisphere winters, and they have been occurring with increasing frequency during the past decade, possibly related to the loss of Arctic sea iceI know, I know - - it all sounds contradictory and your conservative, climate-change denying
So maybe it's not so hard to understand after all. But understanding it is a good thing.